Bump obsidian from 1.5.7-1 to 1.6.6

Bumps [obsidian](https://github.com/obsidianmd/obsidian-api) from 1.5.7-1 to 1.6.6.
- [Changelog](https://github.com/obsidianmd/obsidian-api/blob/master/CHANGELOG.md)
- [Commits](https://github.com/obsidianmd/obsidian-api/commits)

---
updated-dependencies:
- dependency-name: obsidian
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>